The value of 'x' for which (7.6)(7.6) + 7.6x + (0.9)(0.9) is a perfect square is

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180

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1.8

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0.018

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Solution

The correct option is C
1.8

$(7.6) (7.6) + 7.6 x + (0.9) (0.9) = (7.6 + 0.9)^{2} ∴ x = 2 \times 0.9 = 1.8$

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